This article is an extract from our monthly newsletters. Sign up to receive our full newsletters. Research carried out by think tank the Resolution Foundation has suggested that the size of the UK's six-year 'stealth tax' threshold freeze has nearly trebled to £25 billion. The figure is significantly higher than the previous forecast of £9 billion announced during the 2021 Budget. A small number of tax thresholds have been frozen since 2021/22 and are set to remain frozen until April 2028. The think tank found that next year's threshold freeze will raise £12 billion a year by the time of the final freeze in 2027/28. Commenting on the matter, Adam Corlett, Principal Economist at the Resolution Foundation, said: 'High inflation has pushed up the projected revenue take from the government's personal tax threshold freeze to £25 billion a year - almost triple the amount forecast when the freeze was introduced. But higher-income households will be the ones most affected by next year's major tax rises.'